American golfer Brendan Steele earned a three-stroke advantage after the third round of the Sony Open in Hawaii.
Steele carded a six-under-par 64 to claim the outright lead at the Waialae Country Club in Honolulu on Saturday.
Three-time PGA Tour champion Steele and Australian Cameron Davis shared a one-shot cushion atop the leaderboard at the start of the penultimate round.
But a flawless back nine, which was capped by three consecutive birdies to close out the day, saw Steele surge ahead after Davis could only manage a third-round 71.
Steele is 12 under through 54 holes and three clear strokes of second-placed Australian Cameron Smith (66) heading into the final day.
Kevin Kisner (64) is a shot further back at eight under, while Webb Simpson (66), Collin Morikawa (68) and Ryan Palmer (68) are seven under.
Davis slumped to five under overall and a tie for 11th following a forgettable front nine that featured four bogeys in six holes.